Home / 3,131.21-4,320.09-1,804.73

Finding the Fourth Proportional to 3,131.21, 4,320.09 and 1,804.73

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Solution

The fourth proportional to 3,131.21, 4,320.09 and 1,804.73 is: 2,489.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.21 : 4,320.09 = 1,804.73 : x
  2. Step 2: Convert to fraction form
    3,131.21/4,320.09 = 1,804.73/x
  3. Step 3: Cross multiply
    3,131.21x = 4,320.09 × 1,804.73
  4. Step 4: Simplify right side
    3,131.21x = 7,796,606.83
  5. Step 5: Solve for x
    x = 7,796,606.83/3,131.21
  6. Step 6: Final answer
    x = 2,489.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.